Hi, there! Let me see what I can do for you here. Please take my recommendations with a grain of salt. In the end, it is YOUR work and YOUR story and ultimately YOUR decision whether to use what I suggest or stick to your guns--something I am adamant about even with my own work.
Shadows dance in Elora’s mind, laughing. Their fangs snap at her. Her parents beg before the shadows, pleading for their life, for their essence. As I see others have mentioned, and I'd have to agree, this reads really vague. You should start your query with a sharp hook. Something short and snappy and pointed that introduces the problem right away.
Fifteen-year-old I've read on query shark and other sites that it's not prevalent to mention your character's age if you specify that your book is YA anyway. Elora's must face the reality that her parents ’ essence has have been harvested due to their disobedience toward the shadow deity Za. This sentence would probably be a better starting point for you. With her parents now dead, they are labeled as evil "are labeled"? I thought they were dead? and as such the town demands Elora hate them. But she can’t. Why? And how is that prevalent to main plot? Maybe they see HER as evil for being their child instead? Instead Now a pariah in her hometown, she begins a journey (is it an emotional journey? does she actually leave the town?) to clear their name and discovers secrets that have her questioning everything she was every taught there. about the town that pushes Elora towards questioning everything the town has taught her. Try not to be repetitive with certain phrases (in this case "the town"). Agents will see that and assume your manuscript has the same issue. With this new discovery, she is torn between the soul crushing soul crushing is an odd word choice to use here, I think obedience that protects her from harvestation and the joy joy? she's not free yet right? of freedom that endangers her essence. Essence is a bit confusing, because it leaves the reader questioning how exactly that works. Is it autonomy? Are her parents zombies? Empty shells? There's too much left open for interpretation here.
The Questioner is a 94,000 word young adult fantasy novel
with series potential. Definitely don't mention the series potential thing. As others have pointed out as well, agents will pass on your book just for putting it in there. Hook them first with your awesome manuscript. Make them beg for more! I'd also recommend including a comparison here. So let's look at what I've left you with at this point and see if we can spice it up even more.
Elora's parents have been harvested for disobeying Za, the shadow deity of her hometown. Now a pariah, she begins a journey to clear their names and discovers secrets that have her questioning the traditions/laws she grew up with. With these new discoveries, she is torn between the steadfast obedience that protects her from harvestation and the desire for freedom that endangers her very life/autonomy.
Overall, I think you definitely need a little more info in your query, though it certainly captured my interest. Sounds like a great story, but the query needs a bit of fleshing out. Best of luck!